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C3 fraction selective hydrogenation catalyst and preparation method thereof

A technology for catalysts and metal catalysts, which is applied in catalyst activation/preparation, hydrogenation to hydrocarbons, chemical instruments and methods, etc., can solve the problems of high catalyst Pd content, high catalyst cost, and waste gas generation, and reduce the content of active metal components. , the effect of reducing the emission of gas pollutants and simplifying the preparation process

Active Publication Date: 2010-11-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many steps in the whole preparation process, waste gas will be generated during the decomposition process, and the prepared catalyst that can be applied to industrial production has a high Pd content, resulting in high catalyst cost

Method used

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  • C3 fraction selective hydrogenation catalyst and preparation method thereof
  • C3 fraction selective hydrogenation catalyst and preparation method thereof
  • C3 fraction selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh PdCl with a concentration of 10mg Pd / ml 2 10ml of the solution was diluted to 35ml with deionized water, adjusted to a pH of 4.3 with 1mol / L NaOH solution, and then diluted to 46.5g. Weigh the tooth shape Al 2 o 3 Carrier 100g, used Al 2 o 3 The specific surface area of ​​the carrier is 52m 2 / g, the average pore diameter is 30nm, the pore volume is 0.47ml / g, and the prepared PdCl is sprayed on it 2 solution. Take a mixed solution prepared by 20ml of water and 20ml of isopropanol, pour it into the carrier loaded with Pd, disperse evenly, and pour out the excess solution. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 h to obtain catalyst A with a Pd content of 0.1%.

Embodiment 2

[0049] Take the PdCl 2 The amount of the solution was changed to 13.5ml, and the rest of the operations were the same as in Example 1 to obtain catalyst B with a Pd content of 0.135%.

Embodiment 3

[0051] Weigh 10mg Pd / ml of Pd(NO 3 ) 2 Solution 10ml, add 10mg Ag / ml AgNO 3 Solution 20ml, using deionized water to dilute the mixed solution to 46.5g. Weigh the tooth shape Al 2 o 3 Carrier 100g, used Al 2 o 3 The specific surface area of ​​the carrier is 52m 2 / g, the average pore diameter is 30nm, and the pore volume is 0.47ml / g, and the prepared Pd-Ag mixed solution is sprayed on it. Take 9ml of 1mo / L NaOH solution, dilute it to 18ml with deionized water, and spray it on the carrier containing Pd and Ag prepared above. Take the mixed solution prepared by 20ml of water and 20ml of isopropanol, pour it into the product prepared in the above two steps, disperse evenly and pour out the excess solution. The resulting product was used under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 h to obtain catalyst C with a Pd content of 0.1% and an Ag content of 0.2%.

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Abstract

The invention discloses a propylene catalyst for allylene and propadiene selective hydrogenation in C3 fraction and a preparation method thereof; in the invention, after the catalyst passes through the load active metal component, ionization irradiation treatment is needed to be carried out, and the main active metal component Pd of the prepared catalyst is in a single-substance state under room temperature and air condition, and the mean grain size of the active metal component is less than 15nm. The catalyst has the advantages of low load capacity of active metal component Pd, simple preparation process, being applied to the production process of petrochemical industry propylene, and high activity and selectivity.

Description

technical field [0001] The invention relates to a catalyst for the selective hydrogenation of propyne and propadiene to generate propylene in the C3 fraction of cracking products and a preparation method thereof. Background technique [0002] In the process of propylene production, the C3 fraction usually contains 2% to 5% of propyne and propadiene. The existence of these two compounds affects the activity of polypropylene catalysts, increases catalyst consumption, and also makes the performance of polymerization products Descending, therefore, the C3 fraction requires de-alkyne. The widely used method of deacetylation is catalytic selective hydrogenation. [0003] Chinese patent CN1958155A discloses a method of coating Al on an inert carrier 2 o 3 The coating uses Pd, Ag, Bi, and alkali metals as alkyne and diene selective hydrogenation catalysts as metal active components. The catalyst prepared by this method can reduce the consumption of main catalyst Pd and cocatalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J23/58B01J23/50B01J23/89B01J23/52B01J23/63B01J37/34C07C11/06C07C5/09C07C5/05
CPCY02P20/52
Inventor 戴伟彭静彭晖毛祖旺魏根栓于海波乐毅穆玮刘海江
Owner CHINA PETROLEUM & CHEM CORP
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